Subleading Isgur-Wise form factor [chi][sub 3]([ital v][center dot][ital v][prime]) to order [alpha][sub [ital s]] in QCD sum rules

Journal Article · Tue Jun 01 04:00:00 EDT 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.47.5060· OSTI ID:6498677

Neubert, M ^[1]; Ligeti, Z; Nir, Y ^[2]

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1. Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States)
2. Weizmann Institute of Science, Physics Department, Rehovot 76100 (Israel)

We calculate the contributions arising at order [alpha][sub [ital s]] in the QCD sum rule for the spin-symmetry-violating universal function [chi][sub 3]([ital v][center dot][ital v][prime]), which appears at order 1/[ital m][sub [ital Q]] in the heavy quark expansion of meson form factors. In particular, we derive the two-loop perturbative contribution to the sum rule. Over the kinematic range accessible in [ital B][r arrow][ital D][sup (*)][ital l][nu] decays, we find that [chi][sub 3]([ital v][center dot][ital v][prime]) does not exceed the level of [similar to]1%, indicating that power corrections induced by the chromomagnetic operator in the heavy quark expansion are small.

• DOE Contract Number: AC03-76SF00515
• OSTI ID: 6498677
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 47:11; ISSN 0556-2821; ISSN PRVDAQ
• Country of Publication: United States
• Language: English

Related Subjects

662120 -- General Theory of Particles & Fields-- Symmetry
Conservation Laws
Currents & Their Properties-- (1992-)
662230* -- Quantum Chromodynamics-- (1992-)
662350 -- Decays of Mesons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
BEAUTY PARTICLES
BOSONS
CHARM PARTICLES
CHARMED MESONS
COMPOSITE MODELS
D MESONS
DECAY
ELEMENTARY PARTICLES
EQUATIONS
FIELD THEORIES
FLAVOR MODEL
FORM FACTORS
HADRONS
MATHEMATICAL MODELS
MESONS
PARTICLE DECAY
PARTICLE MODELS
PARTICLE PROPERTIES
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
SEMILEPTONIC DECAY
SUM RULES
SYMMETRY BREAKING
WEAK PARTICLE DECAY